What are two important properties of the heart that are required for it to pump blood?

1) Volume-Cardiac Output (CO)2) Pressure-Aterial Pressure (MAP)

What are the two regulatory mechanisms of the heart and what do they do?

1) Local: each individual organ can regulate its own blood flow to an extent2) Global: global control

Where are action potentials generated in the heart and how are they generated?

Pace maker in SA Node through spontaneous depolarization

Does the heart need nerves to contract?

No

What are two special characteristics of action potentials in the heart?

1) Long action potential2) No summation or tetanus

What are the two specialized conduction systems of the heart and why are they important?

1) Rapid (potential to all fibers)Need synchronous contration essentially all at once2) Fibrous tissue between atria and ventriclesAV Node has a delay which keeps atriums and ventricles from contracting at the same time